使用poi进行Excel进行导入与导出数据

poi进行Excel进行导入与导出数据
1.数据库

2.我用的SpringBoot+poi下面是我的目录结构

3.application.yml配置文件

4.pom.xml文件

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.3.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.zkyl</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><name>demo</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.0.0</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.17</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.16-beta2</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>

**(1)**Pemo

package com.zkyl.pojo;import lombok.Data;/*** Created by libaofeng on 2019/3/29.*/@Datapublic class Pemo {private Integer pid;private String pname;private String psex;private String paddress;private Integer page;}

(2)PemoImportVo(负责结束Excel上的数据的实体类)

package com.zkyl.pojo;import lombok.Data;/*** Created by libaofeng on 2019/3/29.*/@Datapublic class PemoImportVo {private String pid;private String pname;private String psex;private String paddress;private String page;}

6.Controller

package com.zkyl.controller;import com.zkyl.pojo.Pemo;import com.zkyl.service.PemoService;import com.zkyl.util.ResultVO;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletResponse;import java.util.List;/*** Created by libaofeng on 2019/3/29.*/@Controllerpublic class PemoController {@Autowiredprivate PemoService pemoService;@ResponseBody@GetMapping("queryPemo")public List<Pemo> queryPemo() {return pemoService.querryPemo();}@GetMapping("poifile111")public String poifile(Model model) {return "poifile";}@ResponseBody@PostMapping("exportExcel1")public ResultVO exportExcel(HttpServletResponse response) throws Exception {return pemoService.exportExcel(response);}@ResponseBody@PostMapping("exportExcel")public ResultVO<List<Pemo>> importFile(MultipartFile file) throws Exception {return pemoService.importFile(file);}}**7.mapper接口与mapper.xml**

package com.zkyl.mapper;import com.zkyl.pojo.Pemo;import org.apache.ibatis.annotations.Mapper;import java.util.List;/*** Created by libaofeng on 2019/3/29.*/@Mapperpublic interface PemoMapper {List<Pemo> querryPemo();int insertPemo(List<Pemo> pemoList);}

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.zkyl.mapper.PemoMapper"><select id="querryPemo" resultType="com.zkyl.pojo.Pemo">SELECT *FROM  pemo;</select><insert id="insertPemo" parameterType="java.util.List">INSERT into pemo (pname,psex,paddress,page) VALUES<foreach collection="list" item="item" open="(" close=")" separator="),(">#{item.pname},#{item.psex},#{item.paddress},#{item.page}</foreach></insert></mapper>

8.util工具类 ExportUtil,POIClass,ResultVO,ResultVOBuilder

package com.zkyl.util;import lombok.extern.slf4j.Slf4j;import org.springframework.core.io.ClassPathResource;import javax.servlet.http.HttpServletResponse;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;/*** excel导出数据* @author dk*/@Slf4jpublic class ExportUtil {private ExportUtil(){}/*** 封装返回的流信息* @param response* @param fileName* @throws Exception*/public static void toPackageOs(HttpServletResponse response , String fileName)throws Exception{response.setContentType("application/octet-stream;charset=utf-8");String outFileName = fileName + new SimpleDateFormat("yyyy-MM-dd").format(new Date());response.setHeader("Content-Disposition", "attachment;filename=" + new String(outFileName.getBytes(),"iso-8859-1") + ".xls");}public static void toPackageOs(HttpServletResponse response , String fileName, String suffix)throws Exception{response.setContentType("application/octet-stream;charset=utf-8");String outFileName = fileName + new SimpleDateFormat("yyyy-MM-dd").format(new Date());response.setHeader("Content-Disposition", "attachment;filename=" + new String(outFileName.getBytes(),"iso-8859-1") + suffix);}/*** 生成zip返回流头部信息* @param response* @param zipName* @throws Exception*/public static void toPackageZipOs(HttpServletResponse response , String zipName)throws Exception{response.setContentType("APPLICATION/OCTET-STREAM");response.setHeader("Content-Disposition","attachment; filename="+new String(zipName.getBytes(),"iso-8859-1"));}/*** 生成模板输入流* @param temPath* @return* @throws Exception*/public static InputStream toPackageIn(String temPath)throws Exception{return new ClassPathResource((temPath)).getInputStream();}/*** 一次性导出全部数据* @param <T>* @param list* @param os*//*public static <T> void exportExcel(List<T> list, OutputStream os ,InputStream in)throws Exception{long exportExcelBegin = System.currentTimeMillis();log.warn("exportExcel begin: " + exportExcelBegin);Context context = new Context();context.putVar("list", list);JxlsHelper.getInstance().processTemplateAtCell(in, os, context, "Result!A1");os.flush();long exportExcelEnd = System.currentTimeMillis();log.warn("exportExcel fininshed in: " + (exportExcelEnd - exportExcelBegin));}*//*** 压缩制定目录下的文件, 生成并下载zip文件* @param srcFile 目标目录* @param zipPath 生成的zip文件的全路径* @param os 返回流  把zip流写到返回流中* @throws Exception*/public static void zipExcel(String srcFile , OutputStream os)throws Exception{// 要被压缩的文件夹File file = new File(srcFile);InputStream input = null;ZipOutputStream zipOut = new ZipOutputStream(os);// zip的名称为zipOut.setComment(file.getName());if (file.isDirectory()) {File[] files = file.listFiles();for (int i = 0; i < files.length; ++i) {input = new FileInputStream(files[i]);zipOut.putNextEntry(new ZipEntry(file.getName() + File.separator + files[i].getName()));int temp = 0;while ((temp = input.read()) != -1) {zipOut.write(temp);}input.close();}}zipOut.close();}/*** 删除文件夹下所有的文件* @param path* @return*/public static boolean delAllFile(String path) {boolean flag = false;File file = new File(path);if (!file.exists()) {return flag;}if (!file.isDirectory()) {return flag;}String[] tempList = file.list();File temp = null;for (int i = 0; i < tempList.length; i++) {if (path.endsWith(File.separator)) {temp = new File(path + tempList[i]);} else {temp = new File(path + File.separator + tempList[i]);}if (temp.isFile()) {temp.delete();}if (temp.isDirectory()) {delAllFile(path + "/" + tempList[i]);//先删除文件夹里面的文件flag = true;}}return flag;}}

package com.zkyl.util;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.Row;import org.springframework.core.io.ClassPathResource;import javax.servlet.http.HttpServletResponse;import java.io.InputStream;import java.text.SimpleDateFormat;import java.util.Date;public class POIClass {/*** 封装返回的流信息* @param response* @param fileName* @throws Exception*/public static void toPackageOs(HttpServletResponse response , String fileName)throws Exception{//设置编码格式response.setContentType("application/octet-stream;charset=utf-8");//拼接名称加上日期String outFileName = fileName + new SimpleDateFormat("yyyy-MM-dd").format(new Date());//给输出的文件设置名称response.setHeader("Content-Disposition", "attachment;filename=" + new String(outFileName.getBytes(),"iso-8859-1") + ".xlsx");}/*** 生成模板输入流* @param temPath* @return* @throws Exception*/public static InputStream toPackageIn(String temPath)throws Exception{return new ClassPathResource((temPath)).getInputStream();}// 给具体的某个行中的某个列赋值public static void toCellValue(Row row, int cellColumn, String value) {Cell cell = row.createCell(cellColumn);cell.setCellValue(value);}}

package com.zkyl.util;import lombok.Data;@Datapublic class ResultVO<T> {private boolean success;private String errorCode;private String errorMessage;private T data;//正常数据//    private Object hint;//异常数据//    private Object[] errorArgs;}

package com.zkyl.util;import lombok.extern.java.Log;/*import org.springframework.transaction.interceptor.TransactionAspectSupport;import org.springframework.transaction.support.TransactionSynchronizationManager;*/@Logpublic class ResultVOBuilder {public static  <T> ResultVO<T> success(T t) {ResultVO<T> result = new ResultVO<>();result.setData(t);result.setSuccess(true);return result;}public static ResultVO error(String errorCode, String message){ResultVO result = new ResultVO();result.setSuccess(false);result.setErrorCode(errorCode);result.setErrorMessage(message);return result;}/*@Autowiredpublic ResultVOBuilder(ResourceBundleMessageSource messageSource) {this.messageSource = messageSource;}*/// mockito 测试用/* private ResultVOBuilder(){ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();messageSource.setBasenames("errorMessage", "constantMessage");messageSource.setUseCodeAsDefaultMessage(true);this.messageSource = messageSource;}*///    private final ResourceBundleMessageSource messageSource;/*public <T> ResultVO<T> failure(ResultVO<?> origin) {return failure(origin.getErrorCode(), origin.getErrorArgs());}public <T> ResultVO<T> failure(String errorCode, Object... errorArgs) {ResultVO<T> result = new ResultVO<>();result.setErrorCode(errorCode);result.setErrorArgs(errorArgs);result.setErrorMessage(messageSource.getMessage(errorCode, errorArgs, LocaleContextHolder.getLocale()));result.setSuccess(false);log.warning(result.getErrorMessage());*//*if (TransactionSynchronizationManager.isActualTransactionActive()) {TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();}*//*return result;}*/}

9.service实现层，与接口层

package com.zkyl.service;import com.zkyl.pojo.Pemo;import com.zkyl.util.ResultVO;import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletResponse;import java.util.List;/*** Created by libaofeng on 2019/3/29.*/public interface PemoService {List<Pemo> querryPemo();ResultVO exportExcel(HttpServletResponse resp) throws Exception;//    ResultVO insertPemo(List<Pemo> pemoList);ResultVO<List<Pemo>> importFile(MultipartFile file) throws Exception;}

package com.zkyl.service.impl;import com.zkyl.mapper.PemoMapper;import com.zkyl.pojo.Pemo;import com.zkyl.pojo.PemoImportVo;import com.zkyl.service.PemoService;import com.zkyl.util.ExportUtil;import com.zkyl.util.POIClass;import com.zkyl.util.ResultVO;import com.zkyl.util.ResultVOBuilder;import org.apache.poi.ss.usermodel.Row;import org.apache.poi.ss.usermodel.Sheet;import org.apache.poi.xssf.usermodel.XSSFRow;import org.apache.poi.xssf.usermodel.XSSFSheet;import org.apache.poi.xssf.usermodel.XSSFWorkbook;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import org.springframework.util.StringUtils;import org.springframework.web.multipart.MultipartFile;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServletResponse;import java.beans.Transient;import java.io.InputStream;import java.util.ArrayList;import java.util.List;/*** Created by libaofeng on 2019/3/29.*/@Servicepublic class PemoServiceImpl implements PemoService {@Autowiredprivate PemoMapper pemoMapper;@Overridepublic List<Pemo> querryPemo() {return pemoMapper.querryPemo();}@Overridepublic ResultVO exportExcel(HttpServletResponse resp) throws Exception {List<Pemo> pemos = pemoMapper.querryPemo();ServletOutputStream outputStream = resp.getOutputStream();POIClass.toPackageOs(resp, "PEMO文件导出");//读取模板中的数据InputStream in = ExportUtil.toPackageIn("static/Pemo.xlsx");//根据模板的数据、把查询出来的数据给摸版SHeet1组中的数据赋值、把excel输出到浏览器上writeDataToExcel(in, "Sheet1", pemos, outputStream);return null;}private void writeDataToExcel(InputStream in, String sheetName, List<Pemo> resultList, ServletOutputStream out) throws Exception {//POi读取模板XSSFWorkbook wb = new XSSFWorkbook(in);//读取sheet1中的数据Sheet sheet = wb.getSheet(sheetName);if (sheet != null) {//向sheet1中赋值，设置样式toResultListValueInfo(sheet, resultList);}//把数据写入到输出流中wb.write(out);//关闭poi方法wb.close();}/*** 插入excel表中项目信息** @param sheet*/private void toResultListValueInfo(Sheet sheet, List<Pemo> pemoList) {//从第五行开始赋值int row_column = 4;//遍历数据集合for (Pemo pemo : pemoList) {//创建一行的方法Row row = sheet.createRow(row_column);// 给第一列序号赋值赋值POIClass.toCellValue(row, 0, pemo.getPid() + "");// 给第二列编码赋值POIClass.toCellValue(row, 1, pemo.getPname() + "");// 给第3列名称赋值POIClass.toCellValue(row, 2, pemo.getPsex() + "");// 给状态赋值POIClass.toCellValue(row, 3, pemo.getPaddress() + "");//给描述赋值POIClass.toCellValue(row, 4, pemo.getPage() + "");row_column++;}}/*** 导入数据** @param file* @return* @throws Exception*/@Override@Transactionalpublic ResultVO<List<Pemo>> importFile(MultipartFile file) throws Exception {List<PemoImportVo> pemoImportVos = new ArrayList<>();ResultVO<List<PemoImportVo>> parse = parse(pemoImportVos, file);List<Pemo> pemoList = transformation(parse.getData());pemoMapper.insertPemo(pemoList);return ResultVOBuilder.success(pemoList);}public List<Pemo> transformation(List<PemoImportVo> pemoImportVos) {List<Pemo> pemoList = new ArrayList<>();for (PemoImportVo pemoImportVo : pemoImportVos) {Pemo pemo = new Pemo();pemo.setPid(Integer.parseInt(pemoImportVo.getPid()));pemo.setPname(pemoImportVo.getPname());pemo.setPsex(pemoImportVo.getPsex());pemo.setPaddress(pemoImportVo.getPaddress());pemo.setPage(Integer.parseInt(pemoImportVo.getPage()));pemoList.add(pemo);}return pemoList;}private final static String PEMO = "Pemo";/*** 验证** @param pemoImportVos* @param file* @return*/public ResultVO<List<PemoImportVo>> parse(List<PemoImportVo> pemoImportVos, MultipartFile file) throws Exception {if (file == null) {return ResultVOBuilder.error("500", "文件不可以为空");}String fileName = file.getOriginalFilename();if (fileName.endsWith(".xls")) {return ResultVOBuilder.error("500", "模板必须是2007版本以上的");}//poi核心类，用来读取excel表格中的数据XSSFWorkbook xssfWorkbook = new XSSFWorkbook(file.getInputStream());//获取单元格中的信息 at0是获取sheet1中的数据。XSSFSheet sheet = xssfWorkbook.getSheetAt(0);//验证第一列第一行的表格标头信息是否为 “询价单导入”，如果不是，提示模板错误。if (!String.valueOf(sheet.getRow(sheet.getFirstRowNum()).getCell(0)).equals(PEMO)) {return ResultVOBuilder.error("500", "模板错误，请检查模板！");}for (int i = sheet.getFirstRowNum() + 3; i < sheet.getLastRowNum(); i++) {XSSFRow xssfRow = sheet.getRow(i);//验证第一列数据、第二列、第三列数据是否为空if ((!StringUtils.isEmpty(String.valueOf(xssfRow.getCell(0)).trim()) &&String.valueOf(xssfRow.getCell(0)) != null) ||(!StringUtils.isEmpty(String.valueOf(xssfRow.getCell(1)).trim()) &&!String.valueOf(xssfRow.getCell(1)).equals("null"))||(!StringUtils.isEmpty(String.valueOf(xssfRow.getCell(2)).trim()) &&!String.valueOf(xssfRow.getCell(2)).equals("null"))) {PemoImportVo pemoImportVo = build(xssfRow);pemoImportVos.add(pemoImportVo);}}return ResultVOBuilder.success(pemoImportVos);}/*** 把取出来的值传到实体类中** @param xssfRow* @return* @throws Exception*/private PemoImportVo build(XSSFRow xssfRow) throws Exception {PemoImportVo addVO = new PemoImportVo();addVO.setPid(String.valueOf(xssfRow.getCell(0)));addVO.setPname(String.valueOf(xssfRow.getCell(1)));addVO.setPsex(String.valueOf(xssfRow.getCell(2)));addVO.setPaddress(String.valueOf(xssfRow.getCell(3)));addVO.setPage(String.valueOf(xssfRow.getCell(4)));return addVO;}}

10.前端代码

<!doctype html><html lang="ch"><head><meta charset="UTF-8"><meta name="viewport"content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>Document</title></head><body><form action="/exportExcel" method="post" enctype="multipart/form-data"><!--enctype="multipart/form-data"是必须的--><input type="file" name="file"><br><input type="submit" id="btnSub" value="提交"></form></body></html>

11.效果 http://localhost:8010/poifile111


到此导入成功：
第一次写博客，写的不好请见谅